How the Christian Calendar Works

The liturgical year: a cycle of seasons that overlays the Gregorian calendar with the story of Christ

A calendar within a calendar

The Christian calendar is not a separate system of dates. It is a layer of meaning placed on top of the Gregorian calendar. The dates are Gregorian. The structure is liturgical: a repeating cycle of seasons that retell the life of Jesus each year, from anticipation (Advent) through birth (Christmas), death (Lent and Good Friday), resurrection (Easter), and the ongoing life of the church (Ordinary Time).

Most Christian denominations follow some version of this cycle, though the emphasis varies. Catholic, Anglican, Lutheran, and Orthodox churches observe it most formally. Many evangelical and nondenominational churches focus primarily on Christmas and Easter.

The six seasons of the liturgical year

Advent

Purple / Blue

4 Sundays before Christmas (late November to December 24)

A season of preparation and anticipation for the coming of Christ. The liturgical year begins here, not on January 1. Each Sunday of Advent lights another candle on the Advent wreath.

Christmas

White / Gold

December 25 through Epiphany (January 6)

Celebrates the birth of Jesus. The “twelve days of Christmas” are the actual liturgical season, running from Christmas Day to Epiphany. Epiphany marks the visit of the Magi.

Ordinary Time (first)

Green

After Epiphany until Ash Wednesday

A period of regular church life between the Christmas cycle and the Easter cycle. “Ordinary” here means “counted” (ordinal), not “unremarkable.”

Lent

Purple

Ash Wednesday through Holy Saturday (40 days before Easter, excluding Sundays)

A season of repentance, fasting, and preparation for Easter. Begins with Ash Wednesday and intensifies during Holy Week (the final week before Easter). Good Friday commemorates the crucifixion.

Easter

White / Gold

Easter Sunday through Pentecost (50 days)

Celebrates the resurrection of Jesus. The longest and most important season in the Christian year. Ends with Pentecost, which marks the coming of the Holy Spirit to the early church.

Ordinary Time (second)

Green

After Pentecost until Advent begins

The longest stretch of the year. Churches focus on the teachings and ministry of Jesus. Ends when Advent begins the cycle again.

Two anchors: Christmas and Easter

The entire liturgical calendar is organized around two events:

Christmas (fixed)

Always December 25. Advent counts backward from it. The Christmas season extends to Epiphany on January 6.

Easter (movable)

Falls on a different date each year (between March 22 and April 25). Lent, Holy Week, Ascension, and Pentecost are all calculated relative to Easter.

Because Easter moves, Lent starts on a different date each year, Pentecost falls on a different date, and the length of Ordinary Time varies. Christmas never moves, so Advent always starts on a predictable Sunday.

The Christian calendar and the Gregorian calendar

The Gregorian calendar itself is a Christian invention. Pope Gregory XIII created it in 1582 specifically to fix the date of Easter, which had drifted under the older Julian calendar. The year numbering (AD/CE) is based on the traditional date of the birth of Jesus.

In a sense, every Gregorian date already carries a Christian layer. The liturgical calendar makes that layer explicit by dividing the year into named seasons with specific readings, prayers, and observances.

For families and churches that also observe holidays from other traditions (Jewish holidays, cultural observances, school dates), a combined calendar that shows both the liturgical season and the civil date is especially useful.

Differences between denominations

Catholic

Observes all six seasons. Includes additional feast days for saints, Mary, and other commemorations throughout the year.

Orthodox

Follows a similar cycle but uses the Julian calendar for Easter calculation, so dates often differ. Some churches use the Revised Julian calendar for fixed holidays.

Anglican / Lutheran

Close to the Catholic cycle. Follows all major seasons with some variation in minor feast days.

Evangelical / Nondenominational

Many focus primarily on Christmas and Easter without formally observing the full liturgical cycle. Growing interest in Advent and Lent in recent years.

Build a calendar with your holidays

CultureSync lets you combine Christian holidays, Jewish holidays, and personal dates in one printable PDF. Customize the design and download.

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